The Duchess of Cambridge gave another indication that she is over her
pregnancy sickness as she enjoyed a family night out at the Royal Albert
Hall to celebrate her 31st birthday.

The Duchess, who spent four days in hospital before Christmas after being struck down by a severe form of morning sickness, went to see the Cirque du Soleil’s Kooza show with the Duke of Cambridge, her parents, her sister Pippa and brother James.

The Duke and Duchess and their guests sat in the Royal box at the venue, though St James’s Palace said their visit on Wednesday night was entirely “private”.

It is the first time the Duchess has been seen out in public this year, though she and the Duke attended church on Christmas Day near the Duchess’s family home in Berkshire.

On that occasion St James’s Palace asked British newspapers not to publish pictures of the Duke and Duchess, though photographs of them attending the service appeared on the internet and in foreign publications.

The Duchess also attended two Christmas dinners in the festive period, including one with Royal household staff in a London restaurant.

The Duke and Duchess are expected shortly to announce the month in which their first child will be born.

They announced the Duchess’s pregnancy far earlier than the usual 12-week stage because of her hospital stay, and royal aides said an announcement of the baby’s due month would be made shortly after the Duchess’s 12-week scan.